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Astroflame Fire Resistant Batt

5 out of 5 stars
Choose a product To see stock availability
From: £46.43 inc VAT
£38.69 ex VAT
Product Overview

Constructed from a mineral fibre core coated on both sides with Astroflame mastic, the Astroflame fire batt is specially designed to seal service penetrations in walls and floors. When the mastic coating is subjected to high temperatures it transforms into a hard ceramic that prevents the passage of fire, smoke and heat for up to 4 hours. Suitable for indoor use without additional protection, with a lifespan of over 25 years, and also providing acoustic and thermal insulation, the Astroflame batt has been tested and proven in a variety of construction materials including concrete, masonry, and plasterboard partitions.

  • 240 minute fire rating
  • Tested to BS 476 Part 20 & EN 1366 Part 3
  • Certifire approved
  • Thermal and acoustic insulation
  • Available in two versions:
    • 600x1200x50mm 140Kgm²
    • 600x1200x60mm 160Kgm²
  • Halogen and asbestos free - no toxic gases emitted when exposed to flame
  • Reduced smoke properties
  • Unaffected by fungus, moisture, oil, or vermin
  • Remains flexible between -5°C to +70°C
  • Not suitable for installations subject to regular structural movements
  • CE Marked
  • UL Certified

Please note: Dust masks, eye protection and gloves should be worn when cutting. Cut edges should be sealed using Astroflame Coating to maintain integrity. Seal batt in place with Astroflame Intumescent Acoustic Mastic.

Technical Data
Product Code

600x1200x50mm 140Kgm²:  AFFBATT50

600x1200x60mm 160Kgm²:  AFFBATT60

Brand Astroflame
Acoustic Insulation

BS EN 10140: 48dB

Air Permeability

BS EN 1026: 600Pa - 100Pa 1.8/1.4 m³/h/m²


50mm: 140kg/m³

60mm: 160kg/m³

Dimensions (LxWxD)

50mm: 1200 x 600 x 50mm

60mm: 1200 x 600 x 60mm

Heat Ageing

336 hours: no defects at 40°C


over 25 years

Maximum Size of Seal

Wall: 5.76m²

Floor: 2.88m²

Protection Level

4 hours

Thermal Conductivity

0.034 W/mK at 10°C

Water Vapour Permeability

3.08g/m²/24 hours


AFFBATT50: 8.0kg

AFFBATT60: 1.0kg

Product Datasheets

Pricing & Availability

Model Stock Price
600x1200x60mm 160Kgm²
Product Code: AFFBATT60
Stock Level:
Available to order Expected dispatch: 30th May

£44.03 inc VAT

£36.69 ex VAT

600x1200x50mm 140Kgm²
Product Code: AFFBATT50
Stock Level:
Available to order Expected dispatch: 30th May

£46.43 inc VAT

£38.69 ex VAT

Delivery Options

The following delivery options are available on this product.

Expedited Delivery

£7.99 inc VAT - Orders will be delivered in 1-2 working days with Evri

Customer Reviews

2 customers have given this product an overall rating of 5 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by:

Easy to use and the results look great

Published on: 6th January 2017

Rating: 5 / 5 Stars

Reviewed by:

Great Product!

Published on: 25th July 2016

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